JP2004041766A - Bifurcated stent and method of making the same - Google Patents

Bifurcated stent and method of making the same Download PDF

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JP2004041766A
JP2004041766A JP2003333592A JP2003333592A JP2004041766A JP 2004041766 A JP2004041766 A JP 2004041766A JP 2003333592 A JP2003333592 A JP 2003333592A JP 2003333592 A JP2003333592 A JP 2003333592A JP 2004041766 A JP2004041766 A JP 2004041766A
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edge
sheet
leg
bifurcated stent
proximal end
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Jacob Richter
ヤコブ　リヒター
Gregory Pinchasik
グレゴリー　ピンチャシク
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Medinol Ltd
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Medinol Ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/856—Single tubular stent with a side portal passage
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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    • A61F2/06—Blood vessels
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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Abstract

<P>PROBLEM TO BE SOLVED: To easily make a bifurcated stent provided with a stem and two legs. <P>SOLUTION: This bifurcated stent 5 is provided with the first leg 10, the second leg 15 and the stem 20. A first sheet is wound, and two facing edges are jointed through a weld part 14 to form the first leg 10. A second sheet is wound, and two facing edges are jointed through a weld part 19 to form the second leg 15. A third sheet is wound, and two facing edges are jointed through a weld part 24 to form the stem 20. The first leg 10 has a proximal end 11, a distal end and a longitudinal bore 13. The second leg 15 has a proximal end 16, a distal end and a longitudinal bore 18. The stem 20 has a proximal end, a distal end 22 and a longitudinal bore 23. The proximal end 11 of the first leg 10 and the proximal end 16 of the second leg 15 are jointed to the distal end 22 of the stem 20, and the respective longitudinal bores 13, 18, 23 are communicated with one another to form the bifurcated stent 5. <P>COPYRIGHT: (C)2004,JPO

Description

　本発明はステントに関し、特に、分岐管内に挿入される二股ステントとその作製方法に関する。 The present invention relates to a stent, and more particularly, to a bifurcated stent to be inserted into a branch tube and a method for producing the same.

　ステントは当該技術分野で良く知られている。一般にステントは、内圧が加わったときに膨張可能な円筒形の金網から形成される。或いは、ワイヤを円筒形に巻いたりシート材を円筒形に形成したりすることによっても、ステントを形成できる。 Stents are well known in the art. Generally, a stent is formed from a cylindrical wire mesh that can expand when an internal pressure is applied. Alternatively, the stent can be formed by winding a wire into a cylindrical shape or forming a sheet material into a cylindrical shape.

　ステントは、脈管系を含む身体の導管内に一般に植え込まれて、血管の崩壊、部分的閉塞、弱化又は異常拡張した部分を補強する装置である。またステントは、例えば尿路や胆管等の他の領域に植え込まれてそのような身体導管を補強するためにも、首尾よく使用されている。 A stent is a device that is commonly implanted within a body vessel, including the vascular system, to reinforce a collapsed, partially occluded, weakened or overexpanded portion of a blood vessel. Stents have also been successfully used to reinforce such body vessels by being implanted in other areas, such as the urinary tract or bile duct.

　米国特許第４，９９４，０７１号（マクレガー）は、連結形成された可撓性の主円筒格子を備えた膨張可能な二股ステントを開示する。主格子よりも小径の２個の補助円筒格子が同様に形成される。主格子は、主格子を一方の補助格子に連結する可撓性ワイヤを備える。第２の可撓性ワイヤが、主格子を他方の補助格子に連結する。これら可撓性ワイヤは、主格子及び各補助格子に沿って軸方向へ延びる背骨部分を構成する。 U.S. Pat. No. 4,994,071 (McGregor) discloses an expandable bifurcated stent with an interconnected flexible main cylindrical lattice. Two auxiliary cylindrical gratings smaller in diameter than the main grating are similarly formed. The main grid comprises flexible wires connecting the main grid to one auxiliary grid. A second flexible wire connects the main grid to the other auxiliary grid. The flexible wires constitute a spine portion that extends axially along the main grid and each auxiliary grid.

　上記米国特許第４，９９４，０７１号に開示された二股ステントの１つの課題は、背骨部分を構成する可撓性ワイヤをループ状構造の各格子に連結する作業が複雑さを伴うことにある。
　本発明の目的は、従来技術における上記課題を解決可能な、茎部と２個の脚部とを備えた二股ステント及びその作製方法を提供することにある。 One problem with the bifurcated stent disclosed in U.S. Pat. No. 4,994,071 is that the operation of connecting the flexible wires that make up the spine portion to each of the grids in the loop-like structure involves complexity. .
An object of the present invention is to provide a bifurcated stent having a stem and two legs, which can solve the above-mentioned problems in the prior art, and a method for manufacturing the same.

　上記目的を達成するために、請求項１に記載の発明は、二股ステントの作製方法であって、ａ）第１縁、第２縁、第３縁及び第４縁を備えた第１シートを用意し、ｂ）第１縁、第２縁、第３縁及び第４縁を備えた第２シートを用意し、ｃ）第１縁、第２縁、第３縁及び第４縁を備えた第３シートを用意し、ｄ）前記第１シートの前記第２縁を、該第２縁に対向する該第１シートの前記第４縁に取付けて、基端及び末端を備える管状の第１脚部を形成し、ｅ）前記第２シートの前記第２縁を、該第２縁に対向する該第２シートの前記第４縁に取付けて、基端及び末端を備える管状の第２脚部を形成し、ｆ）前記第３シートの前記第２縁を、該第２縁に対向する該第３シートの前記第４縁に取付けて、基端及び末端を備える管状の茎部を形成し、ｇ）前記第１脚部の前記基端と前記第２脚部の前記基端とを前記茎部の前記末端に取付ける、各ステップを有することを特徴とする二股ステント作製方法を提供する。 In order to achieve the above object, the invention according to claim 1 is a method for producing a bifurcated stent, comprising: a) a first sheet having a first edge, a second edge, a third edge, and a fourth edge. Providing, b) providing a second sheet having a first edge, a second edge, a third edge, and a fourth edge; c) including a first edge, a second edge, a third edge, and a fourth edge. Providing a third sheet, d) attaching the second edge of the first sheet to the fourth edge of the first sheet opposite the second edge, and forming a first tubular section having a proximal end and a distal end. Forming a leg, e) attaching the second edge of the second sheet to the fourth edge of the second sheet opposite the second edge, and forming a second leg having a proximal end and a distal end. F) attaching the second edge of the third sheet to the fourth edge of the third sheet opposite the second edge to form a tubular stem having a proximal end and a distal end. And g) attaching the said proximal end of said proximal end of said first leg and the second leg portion to said distal end of said stem, to provide a bifurcated stent manufacturing method characterized by having the steps.

　請求項２に記載の発明は、請求項１に記載の二股ステント作製方法において、前記第１シートと前記第２シートとが実質的同一の寸法を有する二股ステント作製方法を提供する。 According to a second aspect of the present invention, there is provided the bifurcated stent manufacturing method according to the first aspect, wherein the first sheet and the second sheet have substantially the same dimensions.

　請求項３に記載の発明は、請求項１に記載の二股ステント作製方法において、前記第１シートと前記第２シートとが異なる寸法を有する二股ステント作製方法を提供する。 According to a third aspect of the present invention, there is provided the bifurcated stent manufacturing method according to the first aspect, wherein the first sheet and the second sheet have different dimensions.

　請求項４に記載の発明は、請求項１に記載の二股ステント作製方法において、前記取付けステップがねじ留めを利用して行われる二股ステント作製方法を提供する。 According to a fourth aspect of the present invention, there is provided a bifurcated stent manufacturing method according to the first aspect, wherein the attaching step is performed by screwing.

　請求項５に記載の発明は、請求項１に記載の二股ステント作製方法において、前記取付けステップがひだ付けを利用して行われる二股ステント作製方法を提供する。 According to a fifth aspect of the present invention, there is provided the bifurcated stent manufacturing method according to the first aspect, wherein the attaching step is performed by using a pleating method.

　請求項６に記載の発明は、請求項１に記載の二股ステント作製方法において、前記取付けステップがはんだ付けを利用して行われる二股ステント作製方法を提供する。 According to a sixth aspect of the present invention, there is provided the bifurcated stent manufacturing method according to the first aspect, wherein the attaching step is performed using soldering.

　請求項７に記載の発明は、請求項１に記載の二股ステント作製方法において、前記取付けステップが溶接を利用して行われる二股ステント作製方法を提供する。 The invention according to claim 7 provides a bifurcated stent manufacturing method according to claim 1, wherein the attaching step is performed using welding.

　請求項８に記載の発明は、請求項７に記載の二股ステント作製方法において、前記溶接がスポット溶接を利用して行われる二股ステント作製方法を提供する。 The invention described in claim 8 provides a bifurcated stent manufacturing method according to claim 7, wherein the welding is performed using spot welding.

　請求項９に記載の発明は、請求項１に記載の二股ステント作製方法において、前記ステントを食刻して、膨張時にその最終寸法を呈するようにするステップをさらに有する二股ステント作製方法を提供する。 According to a ninth aspect of the present invention, there is provided the bifurcated stent manufacturing method according to the first aspect, further comprising a step of etching the stent so as to exhibit its final dimension when expanded. .

　請求項１０に記載の発明は、ａ）第１縁、第２縁、第３縁及び第４縁を備えた第１シートと、ｂ）第１縁、第２縁、第３縁及び第４縁を備えた第２シートと、ｃ）第１縁、第２縁、第３縁及び第４縁を備えた第３シートとを具備し、ｄ）前記第１シートの前記第２縁が、該第２縁に対向する該第１シートの前記第４縁に取付けられて、基端及び末端を備える管状の第１脚部が形成され、ｅ）前記第２シートの前記第２縁が、該第２縁に対向する該第２シートの前記第４縁に取付けられて、基端及び末端を備える管状の第２脚部が形成され、ｆ）前記第３シートの前記第２縁が、該第２縁に対向する該第３シートの前記第４縁に取付けられて、基端及び末端を備える管状の茎部が形成され、ｇ）前記第１脚部の前記基端と前記第２脚部の前記基端とが前記茎部の前記末端に取付けられてなること、を特徴とする二股ステントを提供する。 The invention according to claim 10 is a) a first sheet having a first edge, a second edge, a third edge and a fourth edge; and b) a first edge, a second edge, a third edge and a fourth edge. A second sheet with an edge, c) a third sheet with a first edge, a second edge, a third edge and a fourth edge, and d) the second edge of the first sheet, Attached to the fourth edge of the first sheet opposite the second edge to form a tubular first leg having a proximal end and a distal end; e) the second edge of the second sheet is Attached to the fourth edge of the second sheet opposite the second edge to form a tubular second leg having a proximal end and a distal end; f) the second edge of the third sheet comprises: Attached to the fourth edge of the third sheet opposite the second edge to form a tubular stem having a proximal end and a distal end; g) the proximal end of the first leg and the second Said leg That the end becomes attached to the end of the stem, to provide a bifurcated stent according to claim.

　請求項１１に記載の発明は、請求項１０に記載の二股ステントにおいて、前記第１シートと前記第２シートとが実質的同一の寸法を有する二股ステントを提供する。 According to an eleventh aspect of the present invention, there is provided the bifurcated stent according to the tenth aspect, wherein the first sheet and the second sheet have substantially the same dimensions.

　請求項１２に記載の発明は、請求項１０に記載の二股ステントにおいて、前記第１シートと前記第２シートとが異なる寸法を有する二股ステントを提供する。 According to a twelfth aspect of the present invention, there is provided the bifurcated stent according to the tenth aspect, wherein the first sheet and the second sheet have different dimensions.

　請求項１３に記載の発明は、請求項１０に記載の二股ステントにおいて、前記第１、第２及び第３シートの取付けがねじを用いて行われる二股ステントを提供する。 According to a thirteenth aspect of the present invention, there is provided the bifurcated stent according to the tenth aspect, wherein the first, second, and third sheets are attached using screws.

　請求項１４に記載の発明は、請求項１０に記載の二股ステントにおいて、前記第１、第２及び第３シートの取付けがひだを用いて行われる二股ステントを提供する。 According to a fourteenth aspect of the present invention, there is provided the bifurcated stent according to the tenth aspect, wherein the first, second, and third sheets are attached using folds.

　請求項１５に記載の発明は、請求項１０に記載の二股ステントにおいて、前記第１、第２及び第３シートの取付けがはんだを用いて行われる二股ステントを提供する。 According to a fifteenth aspect of the present invention, there is provided the bifurcated stent according to the tenth aspect, wherein the first, second, and third sheets are attached using solder.

　請求項１６に記載の発明は、請求項１０に記載の二股ステントにおいて、前記第１、第２及び第３シートの取付けが溶接を用いて行われる二股ステントを提供する。 According to a sixteenth aspect of the present invention, there is provided the bifurcated stent according to the tenth aspect, wherein the first, second, and third sheets are attached by welding.

　請求項１７に記載の発明は、請求項１６に記載の二股ステントにおいて、前記溶接がスポット溶接である二股ステントを提供する。 The invention described in claim 17 provides the bifurcated stent according to claim 16, wherein the welding is spot welding.

　請求項１８に記載の発明は、請求項１０に記載の二股ステントにおいて、前記ステントが食刻され、膨張時にその最終寸法を呈するようになっている二股ステントを提供する。 The invention according to claim 18 provides a bifurcated stent according to claim 10, wherein the stent is etched so as to assume its final dimensions when inflated.

　本発明によれば、二股ステントは、所望の型に形成された３枚のシートを用意することにより作製される。３枚のシートは例えば、実質的同一寸法の２枚のシートと、それら２枚のシートのいずれかより幅広の第３のシートとからなる。各シートは、長手方向両縁を巻上げて溶接による接合部を形成することにより管に形成される。大判の第３のシートは、二股ステントの茎部として機能する管を形成し、他のシートはそれぞれ、二股ステントの脚部として機能する管を形成する。２つの脚部を茎部に連結することにより、二股ステントが容易に作製される。 According to the present invention, a bifurcated stent is manufactured by preparing three sheets formed in a desired shape. The three sheets include, for example, two sheets having substantially the same dimensions, and a third sheet wider than any of the two sheets. Each sheet is formed into a tube by winding both longitudinal edges to form a weld joint. The third large sheet forms a tube that functions as the stem of the bifurcated stent, and each of the other sheets forms a tube that functions as a leg of the bifurcated stent. By connecting the two legs to the stem, a bifurcated stent is easily made.

　図１は、本発明の一実施形態に従って作製された二股ステント５を示す。二股ステント５は、第１脚部１０、第２脚部１５及び茎部２０を備える。図２は、第１脚部１０を形成するために使用される第１シート２５と、第２脚部１５を形成するために使用される第２シート３０と、茎部２０を形成するために使用される第３シート３５とを示す。第１シート２５及び第２シート３０は、実質的に平坦で所定の長さ及び幅を有する。多くの適用に対し、第１シート２５及び第２シート３０は実質的同一寸法を有して、実質的同一寸法の両脚部１０、１５を形成する。しかし両脚部１０、１５、及びそれらの形成に使用される両シート２５、３０は、特定の適用に応じて異なる寸法を有することができる。本発明のステントは、組立てたときにその最終寸法を呈するように寸法設定できるが、好適な実施形態では、ステントは膨張可能であって、膨張時にその最終寸法を呈するように寸法設定される。ステント用の両シート２５、３０は、特定の適用に応じて様々なパターンを形成する孔群をそれらに模様付け又は食刻することにより、前述した所要の膨張可能性の特徴を得ることができる。第３シート３５は、それを巻いて管を形成したときに、その内側断面形状が第１脚部１０及び第２脚部１５の断面外径部分を収容できるように寸法設定される。 FIG. 1 shows a bifurcated stent 5 made in accordance with one embodiment of the present invention. The bifurcated stent 5 includes a first leg 10, a second leg 15, and a stem 20. FIG. 2 illustrates a first sheet 25 used to form the first leg 10, a second sheet 30 used to form the second leg 15, and a stem 20 to form the stem 20. 3 shows a third sheet 35 used. The first sheet 25 and the second sheet 30 are substantially flat and have a predetermined length and width. For many applications, the first sheet 25 and the second sheet 30 have substantially identical dimensions to form substantially identically sized legs 10,15. However, the legs 10, 15 and the sheets 25, 30 used to form them can have different dimensions depending on the particular application. While the stent of the present invention can be dimensioned to assume its final dimensions when assembled, in a preferred embodiment, the stent is expandable and dimensioned to assume its final dimensions upon expansion. Both sheets 25, 30 for the stent can obtain the required expandability characteristics described above by patterning or etching them with holes that form various patterns depending on the particular application. . The third sheet 35 is dimensioned such that when it is rolled up to form a tube, its inner cross-sectional shape can accommodate the outer diameter section of the first leg 10 and the second leg 15.

　第１シート２５は、第１縁２６、第２縁２７、第３縁２８及び第４縁２９を備える。第２シート３０は、第１縁３１、第２縁３２、第３縁３３及び第４縁３４を備える。第３シート３５は、第１縁３６、第２縁３７、第３縁３８及び第４縁３９を備える。板金を切断して各シート２５、３０、３５を形成した後、各シートを変形して巻き、対向２縁を合わせて円筒を形成する。図２及び図３の実施形態では、第２縁２７と第４縁２９とが溶接部１４を介して接合されて、第１脚部１０が形成される。また、第２縁３２と第４縁３４とが溶接部１９を介して接合されて、第２脚部１５が形成される。さらに、第２縁３７と第４縁３９とが溶接部２４を介して接合されて、茎部２０が形成される。これら縁は、例えばねじ留め、ひだ付け、はんだ付け等の、この目的に適した当業者に周知の様々な方法で接合できるが、好適な実施形態では溶接が採用される。特に好適な実施形態では、スポット溶接が採用される。 The first sheet 25 includes a first edge 26, a second edge 27, a third edge 28, and a fourth edge 29. The second sheet 30 includes a first edge 31, a second edge 32, a third edge 33, and a fourth edge. The third sheet 35 includes a first edge 36, a second edge 37, a third edge 38, and a fourth edge 39. After cutting the sheet metal to form each of the sheets 25, 30, and 35, each sheet is deformed and wound, and the two opposing edges are joined to form a cylinder. In the embodiment of FIGS. 2 and 3, the second edge 27 and the fourth edge 29 are joined via the welded portion 14 to form the first leg 10. Further, the second edge 32 and the fourth edge 34 are joined via the weld 19 to form the second leg 15. Further, the second edge 37 and the fourth edge 39 are joined via the welded portion 24 to form the stem 20. The edges can be joined in a variety of ways known to those skilled in the art suitable for this purpose, such as, for example, screwing, crimping, soldering, but in a preferred embodiment welding is employed. In a particularly preferred embodiment, spot welding is employed.

　図３に示すように、第１脚部１０は基端１１及び末端１２を備え、長手方向ボア１３を画定する。第２脚部１５は基端１６及び末端１７を備え、長手方向ボア１８を画定する。茎部２０は基端２１及び末端２２を備え、長手方向ボア２３を画定する。図４は、組立直前の第１脚部１０、第２脚部１５及び茎部２０を示す。二股ステント５を形成するために、第１脚部１０の基端１１と第２脚部１５の基端１６とが茎部２０の末端２２に接合され、各長手方向ボア１３、１８、２３が互いに連通される。図５は組立てられたステントの端面図であり、図６は同側面図である。 第 As shown in FIG. 3, the first leg 10 has a proximal end 11 and a distal end 12 and defines a longitudinal bore 13. The second leg 15 has a proximal end 16 and a distal end 17 and defines a longitudinal bore 18. Stem 20 has a proximal end 21 and a distal end 22 and defines a longitudinal bore 23. FIG. 4 shows the first leg 10, the second leg 15, and the stem 20 just before assembly. To form the bifurcated stent 5, the proximal end 11 of the first leg 10 and the proximal end 16 of the second leg 15 are joined to the distal end 22 of the stem 20, and each longitudinal bore 13, 18, 23 is formed. Communicated with each other. FIG. 5 is an end view of the assembled stent, and FIG. 6 is a side view of the same.

本発明の一実施形態に従って作製された二股ステントを示す斜視図である。1 is a perspective view showing a bifurcated stent made according to one embodiment of the present invention. 図１の二股ステントの脚部及び茎部の形成に使用される各シートを示す平面図である。FIG. 2 is a plan view showing each sheet used for forming a leg and a stem of the bifurcated stent of FIG. 1. 図２の各シートを管状に巻いた状態で示す斜視図である。FIG. 3 is a perspective view showing a state where each sheet of FIG. 2 is rolled into a tube. 図３の各管を組立前の状態で示す斜視図である。FIG. 4 is a perspective view showing each tube of FIG. 3 before assembling. 図３及び図４に示す各管を組立てて形成したステントの端面図である。FIG. 5 is an end view of a stent formed by assembling the tubes shown in FIGS. 3 and 4. 図５に示す組立後のステントの頂面図である。FIG. 6 is a top view of the assembled stent shown in FIG. 5.

符号の説明Explanation of reference numerals

５…二股ステント
１０…第１脚部
１１、１６、２１…基端
１２、１７、２２…末端
１３、１８、２３…長手方向ボア
１５…第２脚部
２０…茎部
２５…第１シート
２６、３１、３６…第１縁
２７、３２、３７…第２縁
２８、３３、３８…第３縁
２９、３４、３９…第４縁
３０…第２シート
３５…第３シート 5 Bifurcated stent 10 First legs 11, 16, 21 Base 12, 17, 22 End 13, 18, 23 Longitudinal bore 15 Second leg 20 Stem 25 First sheet 26 , 31, 36 ... first edges 27, 32, 37 ... second edges 28, 33, 38 ... third edges 29, 34, 39 ... fourth edges 30 ... second sheet 35 ... third sheet

Claims (18)

　二股ステントの作製方法であって、
　ａ）第１縁、第２縁、第３縁及び第４縁を備えた第１シートを用意し、
　ｂ）第１縁、第２縁、第３縁及び第４縁を備えた第２シートを用意し、
　ｃ）第１縁、第２縁、第３縁及び第４縁を備えた第３シートを用意し、
　ｄ）前記第１シートの前記第２縁を、該第２縁に対向する該第１シートの前記第４縁に取付けて、基端及び末端を備える管状の第１脚部を形成し、
　ｅ）前記第２シートの前記第２縁を、該第２縁に対向する該第２シートの前記第４縁に取付けて、基端及び末端を備える管状の第２脚部を形成し、
　ｆ）前記第３シートの前記第２縁を、該第２縁に対向する該第３シートの前記第４縁に取付けて、基端及び末端を備える管状の茎部を形成し、
　ｇ）前記第１脚部の前記基端と前記第２脚部の前記基端とを前記茎部の前記末端に取付ける、
各ステップを有することを特徴とする二股ステント作製方法。 A method for producing a bifurcated stent,
a) preparing a first sheet having a first edge, a second edge, a third edge and a fourth edge;
b) providing a second sheet having a first edge, a second edge, a third edge and a fourth edge;
c) providing a third sheet having a first edge, a second edge, a third edge and a fourth edge;
d) attaching the second edge of the first sheet to the fourth edge of the first sheet opposite the second edge to form a tubular first leg having a proximal end and a distal end;
e) attaching the second edge of the second sheet to the fourth edge of the second sheet opposite the second edge to form a second tubular leg having a proximal end and a distal end;
f) attaching the second edge of the third sheet to the fourth edge of the third sheet opposite the second edge to form a tubular stem having a proximal end and a distal end;
g) attaching the proximal end of the first leg and the proximal end of the second leg to the distal end of the stem;
A method for producing a bifurcated stent, comprising the steps of: 　前記第１シートと前記第２シートとが実質的同一の寸法を有する請求項１に記載の二股ステント作製方法。 The method according to claim 1, wherein the first sheet and the second sheet have substantially the same dimensions. 　前記第１シートと前記第２シートとが異なる寸法を有する請求項１に記載の二股ステント作製方法。 方法 The method according to claim 1, wherein the first sheet and the second sheet have different dimensions. 　前記取付けステップがねじ留めを利用して行われる請求項１に記載の二股ステント作製方法。 The method according to claim 1, wherein the attaching step is performed by screwing. 　前記取付けステップがひだ付けを利用して行われる請求項１に記載の二股ステント作製方法。 The method according to claim 1, wherein the attaching step is performed by using a pleating method. 　前記取付けステップがはんだ付けを利用して行われる請求項１に記載の二股ステント作製方法。 The method according to claim 1, wherein the attaching step is performed using soldering. 　前記取付けステップが溶接を利用して行われる請求項１に記載の二股ステント作製方法。 The method according to claim 1, wherein the attaching step is performed using welding. 　前記溶接がスポット溶接を利用して行われる請求項７に記載の二股ステント作製方法。 8. The method according to claim 7, wherein the welding is performed using spot welding. 　前記ステントを食刻して、膨張時にその最終寸法を呈するようにするステップをさらに有する請求項１に記載の二股ステント作製方法。 2. The method of claim 1 further comprising the step of: etching the stent to assume its final dimensions when expanded. 　ａ）第１縁、第２縁、第３縁及び第４縁を備えた第１シートと、
　ｂ）第１縁、第２縁、第３縁及び第４縁を備えた第２シートと、
　ｃ）第１縁、第２縁、第３縁及び第４縁を備えた第３シートとを具備し、
　ｄ）前記第１シートの前記第２縁が、該第２縁に対向する該第１シートの前記第４縁に取付けられて、基端及び末端を備える管状の第１脚部が形成され、
　ｅ）前記第２シートの前記第２縁が、該第２縁に対向する該第２シートの前記第４縁に取付けられて、基端及び末端を備える管状の第２脚部が形成され、
　ｆ）前記第３シートの前記第２縁が、該第２縁に対向する該第３シートの前記第４縁に取付けられて、基端及び末端を備える管状の茎部が形成され、
　ｇ）前記第１脚部の前記基端と前記第２脚部の前記基端とが前記茎部の前記末端に取付けられてなること、
を特徴とする二股ステント。 a) a first sheet having a first edge, a second edge, a third edge and a fourth edge;
b) a second sheet having a first edge, a second edge, a third edge and a fourth edge;
c) a third sheet having a first edge, a second edge, a third edge, and a fourth edge;
d) the second edge of the first sheet is attached to the fourth edge of the first sheet opposite the second edge to form a first tubular leg having a proximal end and a distal end;
e) the second edge of the second sheet is attached to the fourth edge of the second sheet opposite the second edge to form a second tubular leg having a proximal end and a distal end;
f) the second edge of the third sheet is attached to the fourth edge of the third sheet opposite the second edge to form a tubular stem having a proximal end and a distal end;
g) the proximal end of the first leg and the proximal end of the second leg are attached to the distal end of the stem;
A bifurcated stent, characterized in that: 　前記第１シートと前記第２シートとが実質的同一の寸法を有する請求項１０に記載の二股ステント。 The bifurcated stent according to claim 10, wherein the first sheet and the second sheet have substantially the same dimensions. 　前記第１シートと前記第２シートとが異なる寸法を有する請求項１０に記載の二股ステント。 The bifurcated stent according to claim 10, wherein the first sheet and the second sheet have different dimensions. 　前記第１、第２及び第３シートの取付けがねじを用いて行われる請求項１０に記載の二股ステント。 The bifurcated stent according to claim 10, wherein the first, second and third sheets are attached using screws. 　前記第１、第２及び第３シートの取付けがひだを用いて行われる請求項１０に記載の二股ステント。 The bifurcated stent according to claim 10, wherein the attachment of the first, second and third sheets is performed by using folds. 　前記第１、第２及び第３シートの取付けがはんだを用いて行われる請求項１０に記載の二股ステント。 The bifurcated stent according to claim 10, wherein the first, second, and third sheets are attached using solder. 　前記第１、第２及び第３シートの取付けが溶接を用いて行われる請求項１０に記載の二股ステント。 The bifurcated stent according to claim 10, wherein the attachment of the first, second and third sheets is performed using welding. 　前記溶接がスポット溶接である請求項１６に記載の二股ステント。 17. The bifurcated stent according to claim 16, wherein the welding is spot welding. 　前記ステントが食刻され、膨張時にその最終寸法を呈するようになっている請求項１０に記載の二股ステント。 11. The bifurcated stent of claim 10, wherein the stent is etched to assume its final dimensions upon expansion.
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DE69734691D1 (en) 2005-12-29
PL186753B1 (en) 2004-02-27
EE9700097A (en) 1998-06-15
IL120744A (en) 2004-01-04
CA2393663C (en) 2003-07-15
DE69733722T2 (en) 2005-12-22
EP1040795B1 (en) 2005-07-13
JP2004000791A (en) 2004-01-08
EP1040795A2 (en) 2000-10-04
BR9703057A (en) 1998-11-10
JP3532730B2 (en) 2004-05-31
US6117156A (en) 2000-09-12
RU2002102422A (en) 2003-10-10
CN1166992A (en) 1997-12-10
EP0804907B1 (en) 2005-11-23
US5755734A (en) 1998-05-26
AU1998397A (en) 1997-11-06
UA58485C2 (en) 2003-08-15
JPH1043313A (en) 1998-02-17
SK54797A3 (en) 1998-11-04
ATE310466T1 (en) 2005-12-15
IL120744A0 (en) 1997-08-14
DE19718966A1 (en) 1997-11-27
US5827320A (en) 1998-10-27
US5755735A (en) 1998-05-26
US6406489B1 (en) 2002-06-18
IL144230A (en) 2007-03-08
NO20012907D0 (en) 2001-06-13
PL319780A1 (en) 1997-11-10
DE69733722D1 (en) 2005-08-18
NO311681B1 (en) 2002-01-07
CA2204338A1 (en) 1997-11-03
MX9703259A (en) 1998-04-30
CN1154449C (en) 2004-06-23
SG91258A1 (en) 2002-09-17
JP4567707B2 (en) 2010-10-20
US20030029039A1 (en) 2003-02-13
EP1040795A3 (en) 2000-10-18
IL179676A0 (en) 2007-05-15
NO20012907L (en) 1997-11-04
NO313079B1 (en) 2002-08-12
NO972030L (en) 1997-11-04
EE03739B1 (en) 2002-06-17
EP0804907A3 (en) 1999-02-24
CA2393663A1 (en) 1997-11-03
JP2007203114A (en) 2007-08-16
NZ314698A (en) 1998-06-26
US6090133A (en) 2000-07-18
ATE299359T1 (en) 2005-07-15
CZ130097A3 (en) 1997-12-17
AR017167A2 (en) 2001-08-22
IL192178A (en) 2011-11-30
IL207912A0 (en) 2010-12-30
CA2204338C (en) 2005-03-15
EP0804907A2 (en) 1997-11-05
JP4456842B2 (en) 2010-04-28
DE69734691T2 (en) 2006-06-22
AU729227B2 (en) 2001-01-25
RU2181578C2 (en) 2002-04-27
HK1032899A1 (en) 2001-08-10
AR017168A2 (en) 2001-08-22
IL207912A (en) 2016-05-31
NO972030D0 (en) 1997-04-30
IL192178A0 (en) 2008-12-29
KR970073534A (en) 1997-12-10
US6770091B2 (en) 2004-08-03
AR007008A1 (en) 1999-10-13

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